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The planner of a large city is interested in enhancing public transportation in her area. Let's consider the events: B = event resident takes the bus to work and S = event resident takes the subway to work. B Not B Total S 0 285 285 Not S 280 295 575 Total 280 580 860 (a) What fraction represents the probability of the intersection of the events B and Not S? 285 860 295 860 0 860 280 860 (b) Find P(S U B). (Round your answer to two decimal places.)